[CHANGES]

• The Great Slot/Field Rename:
  
  • "slot" is now called "field"; all perl-visible and XS API has
    been renamed. Various back-compatibility redirections exist for
    most of the parts used by other distributions.
    
• Print a deprecation warning on the legacy 'implements' and
  'extends' keywords
  
• No longer supports the hooks API from pre-v57
  
• Perform unit testing using Data::Dumper instead of Data::Dump to
  reduce non-core test_requires dependencies